Steps to reproduce:

1. With 200 global macros already on the global macro page, add another macro and the system says the macro was added successfully but does not actually add the macro when the page is refreshed.  No entry in the database is added and hence the added macro is never displayed. 

Have also observed that IF there are only 199 global macros, you can add 2 at the same time which will populate the database with 201 macros but any future macro additions/changes will trim (unsure by what means the trim list is determined) the list back down to 200 and randomly delete a macro(s).

Result:
The global macro is not added to the database if there are currently 200 global macros already present.
Expected:
The global macro should be added and then displayed on the global macro page with 201 macros present